[petsc-users] How to solve the pressure possion equations with four neuman bc

[丁老师]

Dear friends:
     In the projection method for the solution of incompressible flow,  a pressure equation with four neuman bcs need to be solved. 
but the pressure matrix is singular. it gives divergence solution.  how to solve this kind of equations.


Regards



 





 





 





 





 





 
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